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Definition of Vacuum tube
1. Noun. Electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope.
Exact synonyms: Electron Tube, Thermionic Tube, Thermionic Vacuum Tube, Thermionic Valve, Tube
Specialized synonyms: Acorn Tube, Diode, Rectifying Tube, Rectifying Valve, Electron Multiplier, Gas-discharge Tube, Klystron, Magnetron, Pentode, Television Pickup Tube, Television-camera Tube, Tetrode, Triode, X-ray Tube
Terms within: Anode, Cathode, Electrode, Control Grid, Grid, Plate
Group relationships: Circuit, Electric Circuit, Electrical Circuit
Generic synonyms: Electronic Device
Specialized synonyms: Acorn Tube, Diode, Rectifying Tube, Rectifying Valve, Electron Multiplier, Gas-discharge Tube, Klystron, Magnetron, Pentode, Television Pickup Tube, Television-camera Tube, Tetrode, Triode, X-ray Tube
Terms within: Anode, Cathode, Electrode, Control Grid, Grid, Plate
Group relationships: Circuit, Electric Circuit, Electrical Circuit
Generic synonyms: Electronic Device
Definition of Vacuum tube
1. Noun. (electronics) An electrical device containing a heated filament inside an evacuated container (generally a glass tube) and used to produce rectification (a diode vacuum tube), amplification or other functions. ¹
¹ Source: wiktionary.com
Medical Definition of Vacuum tube
1. A glass tube from which the air has been removed, containing two or more electrodes, between which passes an electrical current or spark; used in the production of X-rays, or to control circuits. Previously in wide use, the vacuum tube has been supplanted by transistors in electronic circuits. (05 Mar 2000)